This tutorial shows how to add background color to a navigation bar. Some navigation bars already have background color depending on their style and some do not. When a navigation bar is added to a sticky header as show in this tutorial (Pin elements at the top of a page), background color may be needed if that navigation bar do not have other element below it or it is the only element in the sticky header.
Double-click on a navigation bar top open it in the Navigation Bar Editor.
Click on the "Style" tab.
Click on the "Background" tab.
Select "Navigation bar background" from the drop down menu of "Item type".
Select the option "Color" and set the color of your choice.
